Evaluation of the effect of machine settings on quantitative three‐dimensional power Doppler angiography: an <i>in‐vitro</i> flow phantom experiment

Raine‐Fenning, N.; Nordin, Norsuhadat; Ramnarine, Kumar V.; Campbell, Bruce; Clewes, J.; Perkins, Alan C.; Johnson, I. R.

doi:10.1002/uog.6138

Cited by 124 publications

(105 citation statements)

References 15 publications

(20 reference statements)

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“…This resemblance emphasizes the fact that 3D-PD indices are accurate and reproducible. Raine-Fenning et al (2008) as expected. The gain and signal power had the greatest effect followed by the PRF.…”

Section: Discussionsupporting

confidence: 83%

“…The gain and signal power had the greatest effect followed by the PRF. Inspection of the figures in this article (Raine-Fenning et al, 2008) shows that an increase of the PRF from 0.5 to 1.0 was associated with decline of the VI from about 41 to 38% and more significant reduction of the VI was observed at PRF of 2.1. Most published data use a PRF of 0.6-0.9 a range with minimal effect on the VI.…”

Section: Discussionmentioning

confidence: 84%

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Placental volume and three‐dimensional power Doppler analysis in prediction of pre‐eclampsia and small for gestational age between Week 11 and 13 weeks and 6 days of gestation

et al. 2011

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Objective To assess three-dimensional placental volume measurement and three-dimensional power Doppler (3D-PD) indices between 10 weeks and 6 days and 13 weeks and 6 days in predicting pregnancy-induced hypertension (PIH) and small for gestational age (SGA).Methods Three hundred and eight women undergoing fetal nuchal translucency measurement were prospectively assessed using three-dimensional ultrasound in order to measure placental volume and 3D-PD indices: vascularization index (VI), flow index (FI) and vascularization flow index (VFI), using the VOCAL software. The outcome was scored as normal, PIH, SGA or both.Results Eight women developed PIH and ten delivered SGA; and 17 developed PIH or SGA. The age, gestational age at the examination or delivery, number of the pregnancy and the nuchal translucency, were similar in all groups. The placental volume, FI and VFI were similar between the groups. The VI was significantly lower when PIH developed (7.86 ± 3.92 vs. 12.02 ± 7.09 in the normal group, P = 0.035). The crown-rump length (CRL) was significantly smaller in the group where either PIH or SGA developed compared to normal outcome (54.29 ± 6.50 and 59.04 ± 8.89, respectively, P = 0.02). ConclusionPlacental volume is not appropriate for early prediction of PIH or SGA, whereas the VI may be of some potential in detection of PIH. The significance of small CRL in these patients should be further tested.

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Section: Discussionsupporting

confidence: 83%

Section: Discussionmentioning

confidence: 84%

Placental volume and three‐dimensional power Doppler analysis in prediction of pre‐eclampsia and small for gestational age between Week 11 and 13 weeks and 6 days of gestation

et al. 2011

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“…We are still uncertain whether 3D power Doppler measurements truly reflect the vascularization and blood flow of the targeted region. Recent in vitro studies using a flow phantom experiment have explored this issue [11][12][13]. These studies have shown how VI, FI, and VFI indices are not equally related to the number of vessels and volume flow.…”

Section: Discussionmentioning

confidence: 99%

A longitudinal study of three-dimensional ultrasonographic assessment of the placenta in uncomplicated pregnancies

Jeong

Yang

Seol

et al. 2012

Korean J Obstet Gynecol

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Placental vascularization is important for normal pregnancy. The circulatory function of the placenta appears at an early stage of embryo-placental development and is strongly related to fetal growth, placental volume, and uterine blood flow. Therefore, adequate placental angiogenesis is critical for the establishment of normal placental vascularization with subsequent normal development of the fetus [1,2]. Recent advances in technology allow the combination of 3-dimensional (3-D) ultrasound with power Doppler, making it possible to quantify Doppler signals in a volume obtained by 3D scanning and allowing investigation of the placental circulation. Each calculation of the vascularization index (VI), flow index (FI), and vascularization-flow index (VFI) is defined through technological quantification, and these indices are thought to reflect the number of vessels within the volume of interest, the intensity of flow at the time of the 3-D sweep, and both blood flow and vascularization [3]. ORIGINAL ARTICLEKorean J Obstet Gynecol 2012;55 (7) ObjectiveThe purpose of our study was to investigate the relationship between birth weight and 3-dimensional (3D) power Doppler histogram of the placenta in the first-and second-trimester of uncomplicated pregnancies. MethodsIn this longitudinal study, 3D power Doppler ultrasound was performed in 54 non-smoking women with uncomplicated pregnancies at 10 to 13 weeks of gestation and subsequently at 19 to 22 weeks. A correlation and regression analysis was performed for placental volume (PV) and vascular indices versus clinical and sonographic variables. ResultsAll vascular indices of the second-trimester were significantly greater than values of the first-trimester. Placental vascular indices showed an incremental tendency with birth weight, which was only statistically significant when the flow index (FI) of the firsttrimester was considered (P=0.02). The PV of both the first-and second-trimester has a negative correlation with FI of the secondtrimester. ConclusionOur findings suggest that FI of the placenta in the first-trimester significantly affects growth of the fetus and placenta, likely reflecting the degree of placental vascularization during the first-trimester.

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“…Doppler gain appears to be directly correlated with all the 3D power Doppler indices, and the use of higher gains may lead to false signals that could be interpreted as real blood flow (Figure 4a, b). Raine-Fenning et al (27) evaluated how different settings affect the Doppler signal in terms of its quantification by these three indices within a 3D dataset. They found that the gain and signal power have the greatest effect on the power Doppler signal, followed closely by the PRF.…”

Section: Limitations and Artifactsmentioning

confidence: 99%

Three-dimensional ultrasound as a predictor of pregnancy in patients undergoing ART

Yaman

Mayer

2012

J Turkish German Gynecol Assoc

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Evaluation of the effect of machine settings on quantitative three‐dimensional power Doppler angiography: an in‐vitro flow phantom experiment

Abstract: Objectives

Cited by 124 publications

References 15 publications

Placental volume and three‐dimensional power Doppler analysis in prediction of pre‐eclampsia and small for gestational age between Week 11 and 13 weeks and 6 days of gestation

Placental volume and three‐dimensional power Doppler analysis in prediction of pre‐eclampsia and small for gestational age between Week 11 and 13 weeks and 6 days of gestation

A longitudinal study of three-dimensional ultrasonographic assessment of the placenta in uncomplicated pregnancies

Three-dimensional ultrasound as a predictor of pregnancy in patients undergoing ART

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